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Assets/Plugins/MeshCombineStudio/Scripts/Examples/SceneStreaming/StreamedSceneCombiner.cs

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+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+using UnityEngine.SceneManagement;
+
+namespace MeshCombineStudio
+{
+    // This script needs to be attached to a GameObject in the loaded scene, which is the parent of the children to be combined.
+    // This can be done using the RequireComponentAttribute - for example, with NatureManufacture's WorldStreamer,
+    //   this can be added to the ObjectsInSceneParent scripts automatically as follows:
+    //   [RequireComponent(typeof(StreamedSceneCombiner))]
+    //   public class ObjectsInSceneParent : MonoBehaviour {
+    //       // ... rest of code here
+    //
+    public class StreamedSceneCombiner : MonoBehaviour
+    {
+        void Start()
+        {
+            // The rootScene is the scene that loads and unloads other scenes (usually as the player moves)
+            var rootScene = SceneManager.GetActiveScene();
+            
+            foreach (var gameObject in rootScene.GetRootGameObjects())
+            {
+                // find the RootSceneCombiner in the rootScene (there should be only one!)
+                if (gameObject.TryGetComponent<RootSceneCombiner>(out var rootSceneCombiner) &&
+                    rootSceneCombiner.MCSGameObject != null &&
+                    rootSceneCombiner.MCSGameObject.TryGetComponent<MeshCombiner>(out var _))
+                {
+                    // clone the MCS GameObject from the rootScene and make it a child of this GameObject's parent
+                    var mcsGameObject = Instantiate(rootSceneCombiner.MCSGameObject, this.transform.parent);
+                    var meshCombiner = mcsGameObject.GetComponent<MeshCombiner>();
+
+                    // set the parentGOs to this GameObject - this will cause the MeshCombiner to combine the children of this GameObject
+                    meshCombiner.searchOptions.parentGOs = new GameObject[] { this.gameObject };
+
+                    // finally, combine the children of this GameObject
+                    meshCombiner.CombineAll();
+                    break;
+                }
+            }
+        }
+    }
+}